The next wave of showers -- those preceding a dry, sunny weekend -- is expected to arrive at the tail end of the Friday evening rush or later, with uncertainty as to how strong and heavy the rainfall will be, forecasters said.
The line of showers moving across Pennsylvania and forecast to reach Nassau after around 6 or 7 p.m., could weaken as it gets to Long Island, said David Stark, National Weather Service meteorologist based in Upton. Showers, which could be heavy to moderate at times, are expected to last through midnight, even later, he said.
In a special statement the weather service also told of a moderate risk for rip currents on Saturday at ocean beaches.
As of Friday afternoon, the patchy fog had lifted and the air was feeling "very, very muggy," he said, with temperatures in the upper 70s and dew points moving into the upper 60s.
Dense fog began to lift in late morning, when an earlier fog advisory expired.
The weather was causing general arrival and departure delays Friday morning at both LaGuardia and Kennedy airports, according to the Federal Aviation Administration's website.
The agency advised travelers to check with their airlines to see whether their flights are affected.
The damp, sticky conditions will continue into Friday night, when a high-pressure system builds and brings along with it a weekend of temperatures in the mid 80s with clear, sunny skies, Stark said.
"We'll start to show improvement overall at around midnight and then at about 3 or 4 a.m. clouds will decrease significantly," Stark said. "By about 5 a.m., things will really clear out.
"Conditions then will be more comfortable; we'll have a much less humid air mass."
The weekend's clear, sunny skies -- just in time for Father's Day -- will continue through Monday night, the service said.
Tuesday and Wednesday are partly cloudy with a slight chance of rain. On Thursday, clear skies return, with daytime temperatures again expected to be in the low 80s.
With Gary Dymski